Gareth I do have a modicum of experience having served a 5 year apprenticeship at a VW/Audi main dealer having to pass 25 City and Guilds exams to qualify as a master technician before going onto to run my own VW/Audi garage for 20 years in the late 1980/90s, hence me making an assumption that there may be people upon this forum who may have the knowledge to point me in the right direction to resolve the matter myself.